JP2004284124A - Suppression of misregistration due to mutual displacement of a plurality of print heads - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress a misregistration occurring due to a mutual displacement along a scanning direction between a plurality of print heads. <P>SOLUTION: The printing device has a plurality of print heads arranged along a first direction in response to a printing area where a printing medium is classified into a plurality of areas along the first direction. When a misregistration along the second direction of an image recorded in the printing area occurs due to a misregistration along the second direction intersecting a first direction of each of the print heads at right angles, the timing of each of printing data supplied to each of the print heads is adjusted in accordance with a prescribed correction value determined in response to the amount of misregistration. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for suppressing a print shift caused by a positional shift in a sub-scanning direction between a plurality of print heads provided along a main scanning direction for reciprocating a print head.
[0002]
[Prior art]
As an example of a printer (printing device) widely used as an output device of a computer, there is a printer in which a plurality of print heads are provided along a main scanning direction that is a direction in which these print heads reciprocate ( For example, refer to Patent Documents 1 to 3.)
[0003]
[Patent Document 1]
JP-A-5-77494 [Patent Document 2]
JP-A-11-115253 [Patent Document 3]
JP-A-11-170662
In such a printer as described above, a plurality of print heads share an area or overlap each other in the main scanning direction to form an image.
[0005]
[Problems to be solved by the invention]
However, when a plurality of print heads, for example, two print heads are misaligned (also referred to as a “gap”) in a sub-scanning direction perpendicular to the main scanning direction, misalignment occurs. A position shift (also referred to as “print shift”) occurs in the sub-scanning direction between two image areas printed by the two print heads, and high-quality printing cannot be performed. May occur.
[0006]
The present invention has been made in order to solve the above-described problems in the related art, and has a position along a sub-scanning direction between a plurality of print heads provided along a main scanning direction for reciprocating a print head. It is an object of the present invention to provide a technique capable of suppressing a print shift caused by a shift.
[0007]
[Means for Solving the Problems and Their Functions and Effects]
To achieve the above object, a first apparatus of the present invention is a printing apparatus that records an image on a print medium by reciprocating a print head in a first direction,
Corresponding to each print area divided into a plurality of areas along the first direction on the print medium, comprising a plurality of the print heads arranged along the first direction,
A case where a print shift along the second direction of an image recorded in each print area occurs due to a mutual position shift of each of the print heads in a second direction orthogonal to the first direction. At
The timing of each print data supplied to each of the print heads is adjusted according to a predetermined correction value determined according to the amount of the print shift.
[0008]
In this printing apparatus, the timing of each print data supplied to each print head is determined by a predetermined correction value determined according to the amount of print shift along the second direction of an image recorded in each print area. , The printing displacement caused by the mutual displacement of the print heads in the second direction can be suppressed.
[0009]
Further, a second apparatus of the present invention is a printing apparatus that records an image on a print medium by reciprocating a print head in a first direction,
Corresponding to each print area divided into a plurality of areas along the first direction on the print medium, comprising a plurality of the print heads arranged along the first direction,
Each of the print heads includes a dot forming element row provided along a second direction orthogonal to the first direction,
In the case where a print shift along the second direction of an image recorded in each print area occurs due to a mutual positional shift of each print head along the second direction,
According to a predetermined correction value determined in accordance with the amount of deviation of the printing deviation, a predetermined rectangular area that divides each of the print heads so as to include the same number of dot forming elements along the second direction is defined. The use of dot forming elements outside the predetermined rectangular area is prohibited.
[0010]
In this printing apparatus, according to a predetermined correction value determined in accordance with the amount of printing shift, the printing device is positioned outside a predetermined rectangular area divided so as to include the same number of dot forming elements along the second direction. , The use of the dot forming element can be prohibited, so that the printing displacement caused by the mutual displacement of the print heads in the second direction can be suppressed.
[0011]
Here, it is preferable that the predetermined rectangular area is defined such that the number of included dot forming elements is maximized.
[0012]
In this way, printing can be executed most efficiently while suppressing printing deviation.
[0013]
The present invention can be realized in various forms, for example, a printing method and a printing apparatus, a printing control apparatus and a method for controlling the printing apparatus, a printing shift correction method and an apparatus, and a method thereof. Computer, a recording medium on which the computer program is recorded, a data signal including the computer program and embodied in a carrier wave, and the like.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in the following order based on examples.
A. Overall configuration of the device:
B. First embodiment of print misregistration correction:
C. Second embodiment of print misregistration correction:
D. Modification:
[0015]
A. Overall configuration of the device:
FIG. 1 is a block diagram showing a configuration of a printing system as one embodiment of the present invention. This printing system includes a computer 90 and a color inkjet printer 20. The printing system including the printer 20 and the computer 90 can be called a “printing device” in a broad sense.
[0016]
In the computer 90, an application program 95 operates under a predetermined operating system. A video driver 91 and a printer driver 96 are incorporated in the operating system, and print data PD to be transferred to the printer 20 is output from the application program 95 via these drivers. An application program 95 for performing image retouching and the like performs desired processing on an image to be processed, and displays an image on the CRT 21 via a video driver 91.
[0017]
When the application program 95 issues a print command, the printer driver 96 of the computer 90 receives the image data from the application program 95, converts the image data into print data PD, and supplies the print data PD to the printer 20. The printer driver 96 has a resolution conversion module 97, a color conversion module 98, a halftone module 99, a raster conversion module 100, and a color conversion lookup table LUT as modules for creating the print data PD. are doing.
[0018]
The resolution conversion module 97 plays a role of converting the resolution of the color image data formed by the application program 95 into a print resolution. The image data whose resolution has been converted in this way is still image information composed of three color components of RGB. The color conversion module 98 converts the RGB image data into multi-tone data of a plurality of ink colors that can be used by the printer 20 for each pixel while referring to the color conversion lookup table LUT.
[0019]
The color-converted multi-tone data has, for example, 256 tone values. The halftone module 99 generates a halftone image data by executing a so-called halftone process. The halftone image data is rearranged by the raster conversion module 100 in the order of data to be transferred to the printer 20, and output as final print data PD. Note that the print data PD includes raster data indicating a dot formation state in each main scan by each of the two print head units 60A and 60B, and data indicating a sub-scan feed amount.
[0020]
The printer driver 96 further includes a user interface display module 101, a correction value determination module 102, and a test pattern supply module 103. The user interface display module 101 has a function of displaying various user interface windows related to printing, and a function of receiving a user's input in those windows. The user can set various print parameters on the user interface. The print parameters include the type of print medium, the distinction between monochrome printing and color printing, the printing resolution, and correction information on the gap between heads, which will be described later.
[0021]
The correction value determination module 102 determines a print shift correction value according to the correction information CD on the head gap supplied from the printer 20. Further, a print shift correction value is determined according to the correction information on the head gap set in the user interface. The determined correction value is registered in the raster conversion module 100.
[0022]
The test pattern supply module 103 has a function of reading a test pattern print signal TPS representing a test pattern from the hard disk 92 and supplying the read test pattern print signal TPS to the printer 20. This test pattern is used to determine a correction value for a positional deviation (meaning “gap between heads”) of the plurality of print head units along the sub-scanning direction.
[0023]
Note that a program for realizing the function of each module of the printer driver 96 is supplied in a form recorded on a computer-readable recording medium. Examples of such a recording medium include a flexible disk, a CD-ROM, a magneto-optical disk, an IC card, a ROM cartridge, a punched card, a printed matter on which a code such as a bar code is printed, and a computer internal storage device (such as a RAM or ROM). Various computer readable media, such as memory and external storage, can be used. Further, such a computer program can be downloaded to the computer 90 via the Internet.
[0024]
The computer 90 including the printer driver 96 functions as a print control device that supplies the print data PD and the test pattern print signal TPS to the printer 20 to perform printing. Further, it is also possible to function as a print control device having a function of selecting a correction value of a print shift due to a head gap.
[0025]
FIG. 2 is a schematic configuration diagram of the color printer 20. The color printer 20 reciprocates the two carriages 30 </ b> A and 30 </ b> B in the axial direction (main scanning direction) of the platen 26 by the carriage motor 24 and the sub-scan feed mechanism that conveys the print medium P in the sub-scan direction by the paper feed motor 22. A main scanning feed mechanism to drive the print head units 60A and 60B (also referred to as a "print head assembly") mounted on the carriages 30A and 30B to control ink ejection and dot formation; And a control circuit 40 for exchanging signals with the paper feed motor 22, the carriage motor 24, the print head unit 60, and the operation panel 32. The control circuit 40 is connected to the computer 90 via the connector 56.
[0026]
The sub-scan feed mechanism that transports the print medium P includes a gear train (not shown) that transmits the rotation of the paper feed motor 22 to the platen 26 and a paper transport roller (not shown). The main scanning feed mechanism for reciprocating the carriages 30A and 30B is provided with an endless mechanism between a carriage shaft 24 and a slide shaft 34 laid parallel to the axis of the platen 26 and slidably holding the carriages 30A and 30B. And a position sensor 39 for detecting the origin positions of the carriages 30A and 30B.
[0027]
FIG. 3 is an explanatory diagram showing an example of the arrangement of the inkjet nozzles Nz in the print head unit 60 used as the print head units 60A and 60B. These nozzles are arranged from six nozzle arrays that eject ink in each color of black (K), cyan (C), light cyan (LC), magenta (M), light magenta (LM), and yellow (Y). 13 nozzles are arranged in a line at a constant nozzle pitch. These six nozzle arrays are arranged so as to be arranged in the main scanning direction. However, any other arrangement of the nozzle rows can be used. The “nozzle pitch” is a value indicating how many dots (that is, how many pixels) the intervals in the sub-scanning direction of the nozzles arranged on the print head are.
[0028]
The EEPROM 42 included in the control circuit 40 shown in FIG. 2 stores correction information relating to a head gap, which will be described later. This correction information is read from the EEPROM 42 at the time of start-up or at an appropriate timing, and is supplied to the correction value determination module 102 of the computer 90 to determine the print shift correction value.
[0029]
B. First embodiment of print misregistration correction:
B1. Printing misalignment correction method:
FIG. 4 is an explanatory diagram showing the print misalignment correction in the first embodiment. FIG. 4A shows a print target image represented by the print data PD and a print image representing a print result in the case where there is no print misalignment correction. FIG. 4B illustrates a print target image represented by the print data PD and a print image representing a print result in a case where print misalignment is corrected. Note that, as the print data PD, an example is shown in which a data pattern is used in which an image area reproduced with a color having a substantially uniform density is formed as a print image. The area A indicates a print area printed by the first print head 60A, and the area B indicates a print area printed by the second print head 60B.
[0030]
In a state where the print misregistration is not performed, when the print target image shown on the left side of FIG. 4A is printed, as shown on the right side of FIG. It is assumed that the image in the area A is printed with a shift amount δy dots (pixels) along the sub-scanning direction.
[0031]
When printing misalignment occurs as described above, if printing misalignment correction is performed as shown in FIG. 4B, printing misalignment can be suppressed. Specifically, as shown on the left side of FIG. 4B, the image corresponding to the area A among the print images represented by the print data PD in the sub-scanning direction corresponds to the deviation amount δy. The print data PD is corrected so that the print data PD is shifted in the direction opposite to the direction of deviation of the print image in FIG. This makes it possible to correct the printing displacement as shown in FIG. 4A caused in the sub-scanning direction due to the head gap, as shown in FIG. 4B.
[0032]
In this embodiment, the shift amount δy of the image data is used as a print shift correction value, is stored in the EEPROM 42 (FIG. 2) of the printer 20, and is registered in the raster conversion module 100 of the printer driver 96. You.
[0033]
B2. Setting of correction value:
The print misalignment correction value is set before shipment of the printer 20 as described below, and can be corrected by the user after shipment.
[0034]
FIG. 5 is a flowchart showing a procedure for setting a print shift correction value before shipment of the printer 20. In step S1, a test pattern is printed. FIG. 6 shows an example of a test pattern using a color patch. In this example, a test pattern including ten color patches having different shift amounts δy is shown. The correction value number printed beside each color patch is associated in advance with the shift amount δy. Each color patch is a gray patch in which a gray area having a uniform density is reproduced by composite black using C, M, Y, LC, and LM inks. Such a gray patch reflects both the gap between heads and the deviation between dots of each color. Since the actual image quality of printed matter is affected not only by the gap between print heads but also by the deviation between dots of each color, from the viewpoint of improving image quality, it is preferable to use a gray patch reproduced in composite black as a test pattern. .
[0035]
However, various other patterns can be used as the test pattern. For example, other types of color patches or ruled lines along the main scanning direction (also called “horizontal ruled lines”) can be used. . In this specification, a “color patch” refers to an image area reproduced in a substantially uniform color.
[0036]
In step S2 of FIG. 5, from among the plurality of printed color patches, a color patch whose print deviation has been corrected and which has the highest image quality is selected, and a deviation amount δy corresponding to the correction value number is set as a print deviation correction value. It is set in the EEPROM 42 (FIG. 2) of the printer 20. In the example of FIG. 6, the shift amount δy (= y5) corresponding to the correction value number (= 5) of the color patch having no step at the boundary between the area A and the area B is stored in the EEPROM 42 as a print shift correction value. Is done. The correction value set by the inspection before shipment is also referred to as a “reference correction value”.
[0037]
FIG. 7 is a flowchart illustrating a procedure for setting a print shift correction value by a user. In step S11, a test pattern is printed according to a user's instruction. The user's instruction is executed via a print instruction window (not shown) displayed by the user interface display module 101 (FIG. 1). This print instruction window is a window for allowing the user to give an instruction to print a test pattern, and is displayed as one of the utility windows in the printer properties. When the user gives an instruction to print a test pattern via this user interface window, the test pattern supply module 103 (FIG. 1) reads out the test pattern print signal TPS from the hard disk 92 and supplies it to the printer 20. Print a test pattern. This test pattern may be the same as the test pattern (FIG. 6) used for setting the print misalignment correction value before shipping, or may be a different test pattern. In this embodiment, the test pattern shown in FIG. 6 is used.
[0038]
In step S12 of FIG. 7, from among the plurality of printed color patches, a color patch having the highest image quality with the print deviation corrected is selected, and a deviation amount δy (correction value) corresponding to the correction value number is set. I do. The setting of the preferred correction value number is executed via a correction value number selection window (not shown) displayed by the user interface display module 101 (FIG. 1). This correction value number selection window is automatically displayed by the user interface display module 101 (FIG. 1) when the test pattern is printed. In the correction value number selection window, for example, a plurality of buttons for selecting a preferable correction value number are provided. When the user clicks one of these buttons, the shift amount δy corresponding to the preferred correction value number is registered in the raster conversion module 100 of the printer driver 96 as a print shift correction value. The print shift correction value may be registered as a replacement for the reference correction value set in step S2 of FIG. 5, or a value for correcting the reference correction value is stored separately from the reference correction value. You may. Further, the shift amount δy corresponding to the correction value number set by the user may be stored in the EEPROM 42 of the printer 20.
[0039]
In step S13 in FIG. 7, actual printing is executed in response to a user instruction. At this time, the raster conversion module 100 in FIG. 1 generates the print data PD representing the image in which the print shift has been corrected according to the print shift correction value set in step S12 as described in FIG.
[0040]
C. Second embodiment of print misregistration correction:
C1. Printing misalignment correction method:
FIG. 8 is an explanatory diagram showing the print misalignment correction in the second embodiment. FIG. 8 shows an enlarged part of the nozzle arrangement of each of the two print head units 60A and 60B. As shown in the drawing, it is assumed that the first print head unit 60A is arranged to be displaced from the second print head unit 60B by the shift amount δn along the sub-scanning direction. Note that the shift amount δn is represented by the number of nozzle pitches in units of the interval (nozzle pitch) between two nozzles. Specifically, the thirteenth nozzle Nz (# 13A) of the first print head unit 60A shifts in the sub-scanning direction with respect to the corresponding nozzle Nz (# 13B) of the second print head unit 60B. It is assumed that they are arranged so as to protrude by δn = 2. When the two print head units 60A and 60B are displaced in this manner, a print shift corresponding to the nozzle shift amount δn occurs.
[0041]
Therefore, the nozzles of the two print head units 60A and 60B that are shifted from each other (projecting portions), that is, the first and second nozzles Nz (# 1B) of the second print head unit 60B. , Nz (# 2B) and the twelfth and thirteenth nozzles Nz (# 12A), Nz (# 13A) of the first print head unit 60A are set to be unused. Alternatively, the first print head unit 60A and the second print head unit 60B define a rectangular area (indicated by a broken line in the drawing) which is divided so as to include the same number of nozzles Nz. It can also be said that only the nozzles Nz in the area are set to be usable. Then, the raster conversion module 100 (FIG. 1) generates the print data PD by using only the nozzles Nz set to be usable. Specifically, the third to thirteenth nozzles Nz (# 3B) to Nz (# 13B) of the second print head unit 60B are given an offset corresponding to the shift amount δn to provide the first to eleventh nozzles. The first to eleventh nozzles of the first print head unit 60A that are used as the second nozzles Nz (# 1B) to Nz (# 11B) and are arranged substantially in line in the sub-scanning direction. Only Nz (# 1A) to Nz (# 11A) are used. This effectively arranges the first print head unit 60A and the second print head unit 60B substantially in the sub-scanning direction. Can be suppressed. However, in this case, a gap smaller than the nozzle pitch cannot be corrected.
[0042]
In this embodiment, the nozzle shift amount δn (the number of nozzle pitches) between the print head units is used as a print shift correction value, stored in the EEPROM 42 of the printer 20 (FIG. 2), and It is registered in 96 raster conversion modules 100. In the raster conversion module 100, use / non-use of each nozzle is determined according to the registered print misalignment correction value. However, in the correction value determination module 102, use / non-use of each nozzle is determined according to the shift amount δn, and the determined use / unused information of each nozzle is registered in the raster conversion module 100 as a print shift correction value. You may make it so.
[0043]
C2. Setting of correction value:
Also in the present embodiment, the print shift correction value is set before the shipment of the printer 20 according to the print shift correction value setting procedure before the shipment of the printer 20 shown in FIG. 5 in the first embodiment. The user can make corrections after shipping the printer 20 according to the procedure for setting the print shift correction value by the user shown in FIG.
[0044]
In this embodiment, the test patterns shown in FIG. 9 are used in step S1 in FIG. 5 and step S11 in FIG. FIG. 9 shows an example of a test pattern using horizontal ruled lines along the main scanning direction. In this example, thirteen sets of ruled line pairs consisting of ruled lines printed in the area A by the first print head 60A and ruled lines printed in the area B by the second print head 60B are printed. In each ruled line pair, the nozzle number of the first print head 60A for printing the ruled line in the area A is different from the nozzle number of the second printhead 60B (# 7) for printing the ruled line in the area B. They differ in the order of # 1 to # 13. The difference in the combination of the nozzles, that is, the nozzle shift amount δn corresponds to the correction value number. Note that the test pattern does not necessarily have to be a horizontal ruled line. However, if a horizontal ruled line is used, it is possible to easily grasp a nozzle shift. Further, the nozzle numbers used in the test pattern in FIG. 9 are merely examples, and various combinations of patterns can be used.
[0045]
As in the case of the first embodiment, in step S2 of FIG. 5, a printing rule is corrected and a ruled line pair having the least deviation is selected from a plurality of printed ruled line pairs. The deviation amount δn is set in the EEPROM 42 (FIG. 2) of the printer 20 as a reference correction value. In the example of FIG. 9, the shift amount δn (= 2) corresponding to the correction value number (= 5) of the ruled line pair having no step at the boundary between the area A and the area B is stored in the EEPROM 42 as a correction value. .
[0046]
Further, in step S12 of FIG. 7, as in the case of the first embodiment, a ruled line pair whose print misalignment has been corrected and which has the least misalignment is selected from a plurality of printed ruled line pairs, and the correction value number thereof is selected. Is registered in the raster conversion module 100 (FIG. 1) of the printer driver 96 as a print shift correction value.
[0047]
D. Modification:
It should be noted that the present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.
[0048]
D1. Modification 1
In the above embodiment, a color ink jet printer has been described. However, the present invention can be applied to a monochrome printer, and can also be applied to a printer other than an ink jet printer. INDUSTRIAL APPLICABILITY The present invention can be generally applied to a printing apparatus that records (prints) an image on a print medium, and can be applied to, for example, a facsimile apparatus and a copying machine.
[0049]
D2. Modified example 2:
The above embodiment describes a case where two print head units are provided. However, the present invention is not limited to this, and can be applied to a case where a plurality of print heads are provided.
[0050]
D3. Modification 3:
In each of the above embodiments, the print shift correction value is stored in the EEPROM 41 in the printer 20. However, this correction value can be stored in a nonvolatile memory provided at an arbitrary place in the printer. .
[0051]
D4. Modification 4:
In the above-described first embodiment, the case where correction of print misalignment is performed in the raster conversion module 100 is described. However, the present invention is not limited to this, and any one of the resolution conversion module 97 to the raster conversion module 100 may be used. It is also possible to be executed in.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a printing system as one embodiment of the present invention.
FIG. 2 is a schematic configuration diagram of a color printer 20.
FIG. 3 is an explanatory diagram showing an example of an arrangement of inkjet nozzles Nz in a print head unit 60 used as the print head units 60A and 60B.
FIG. 4 is an explanatory diagram showing print displacement correction in the first embodiment.
FIG. 5 is a flowchart illustrating a procedure for setting a print shift correction value before shipment of the printer 20.
FIG. 6 is an explanatory diagram showing an example of a test pattern using a color patch.
FIG. 7 is a flowchart illustrating a procedure for setting a print shift correction value by a user.
FIG. 8 is an explanatory diagram showing print misalignment correction in a second embodiment.
FIG. 9 is an explanatory diagram showing an example of a test pattern using horizontal ruled lines along the main scanning direction.
[Explanation of symbols]
20 ... Color inkjet printer (color printer)
22 Paper feed motor 24 Carriage motor 26 Platen 30A, 30B Carriage 32 Operation panel 34 Sliding shaft 36 Drive belt 38 Pulley 39 Position sensor 40 Control circuit 42 EEPROM
56 connectors 60A, 60B print head unit 90 computer 91 video driver 92 hard disk 95 application program 96 printer driver 97 resolution conversion module 98 color conversion module 99 halftone module 100 raster conversion module 101 User interface display module 102: correction value determination module 103: test pattern supply module

Claims (9)

A printing apparatus that records an image on a print medium by reciprocating a print head along a first direction,
Corresponding to each print area divided into a plurality of areas along the first direction on the print medium, comprising a plurality of the print heads arranged along the first direction,
A case where a print shift along the second direction of an image recorded in each print area occurs due to a mutual position shift of each of the print heads in a second direction orthogonal to the first direction. At
A printing apparatus, wherein the timing of each print data supplied to each of the print heads is adjusted in accordance with a predetermined correction value determined according to the amount of the print shift. A printing apparatus that records an image on a print medium by reciprocating a print head along a first direction,
Corresponding to each print area divided into a plurality of areas along the first direction on the print medium, comprising a plurality of the print heads arranged along the first direction,
Each of the print heads includes a dot forming element row provided along a second direction orthogonal to the first direction,
In the case where a print shift along the second direction of an image recorded in each print area occurs due to a mutual positional shift of each print head along the second direction,
According to a predetermined correction value determined in accordance with the amount of deviation of the printing deviation, a predetermined rectangular area that divides each of the print heads so as to include the same number of dot forming elements along the second direction is defined. And a printing apparatus for prohibiting the use of dot forming elements outside the predetermined rectangular area. 3. The printing device according to claim 2, wherein
The printing apparatus according to claim 1, wherein the predetermined rectangular area is defined such that the number of included dot forming elements is maximized. A plurality of print heads arranged along the first direction corresponding to each print area divided into a plurality of areas along the first direction on the print medium, wherein each print head is A print control device for controlling printing of a printing device that records an image on a print medium by reciprocating in a direction of 1.
A case where a print shift along the second direction of an image recorded in each print area occurs due to a mutual position shift of each of the print heads in a second direction orthogonal to the first direction. At
A print control apparatus, wherein a timing of each print data supplied to each of the print heads is adjusted according to a predetermined correction value determined according to a shift amount of the print shift. A plurality of print heads arranged along the first direction corresponding to each print area divided into a plurality of areas along the first direction on the print medium, wherein each print head is A print control device for controlling printing of a printing device that records an image on a print medium by reciprocating in a direction of 1.
In the case where a print shift along the second direction of an image recorded in each print area occurs due to a mutual positional shift of each print head along the second direction,
According to a predetermined correction value determined in accordance with the amount of deviation of the printing deviation, a predetermined rectangular area that divides each of the print heads so as to include the same number of dot forming elements along the second direction is defined. And a printing control device for prohibiting the use of dot forming elements outside the predetermined rectangular area. A plurality of print heads arranged along the first direction are orthogonal to the first direction, corresponding to each print area divided on the print medium into the plurality of areas along the first direction. A method of correcting a print shift along the second direction, which is generated in an image recorded in each of the print areas by a mutual position shift along a second direction,
Prepare a predetermined correction value that is determined according to the amount of deviation of the printing deviation,
A print misalignment correction method, comprising: adjusting a timing of each print data supplied to each of the print heads according to the predetermined correction value. A plurality of print heads arranged along the first direction are orthogonal to the first direction, corresponding to each print area divided on the print medium into the plurality of areas along the first direction. A method of correcting a print shift along the second direction, which is generated in an image recorded in each of the print areas by a mutual position shift along a second direction,
Prepare a predetermined correction value that is determined according to the amount of deviation of the printing deviation,
According to the predetermined correction value, a predetermined rectangular area that divides each of the print heads so as to include the same number of dot forming elements along the second direction is defined, and the predetermined rectangular area is defined outside the predetermined rectangular area. A print misalignment correction method, wherein use of a certain dot forming element is prohibited. A plurality of print heads arranged along the first direction corresponding to each print area divided into a plurality of areas along the first direction on the print medium, wherein each print head is A computer program for operating a computer as a print control device for controlling printing of a printing device that records an image on a print medium by reciprocating in a direction of 1.
A case where a print shift along the second direction of an image recorded in each print area occurs due to a mutual position shift of each of the print heads in a second direction orthogonal to the first direction. At
A program for causing the computer to realize a function of adjusting a timing of each print data supplied to each of the print heads according to a predetermined correction value determined according to a shift amount of the print shift. Computer program. A plurality of print heads arranged along the first direction corresponding to each print area divided into a plurality of areas along the first direction on the print medium, wherein each print head is A computer program for operating a computer as a print control device for controlling printing of a printing device that records an image on a print medium by reciprocating in a direction of 1.
In the case where a print shift along the second direction of an image recorded in each print area occurs due to a mutual positional shift of each print head along the second direction,
According to a predetermined correction value determined in accordance with the amount of deviation of the printing deviation, a predetermined rectangular area that divides each of the print heads so as to include the same number of dot forming elements along the second direction is defined. A computer program including a program for causing the computer to implement a function of prohibiting use of a dot forming element outside the predetermined rectangular area.

Images